SSC (English Medium) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions

`(1 + cot^2A)/(1 + tan^2A)` = ?

`sin θ = 1/2`, then θ = ?

tan (90 – θ) = ?

cos 45° = ?

Which is not correct formula?

`(1 - tan^2 45^circ)/(1 + tan^2 45^circ)` = ?

If `tan θ = 13/12`, then cot θ = ?

Prove that `"cosec"  θ xx sqrt(1 - cos^2θ) = 1`.

If `1 - cos^2θ = 1/4`, then θ = ?

Prove that `(cos(90^circ - A))/(sin A) = (sin(90^circ - A))/(cos A)`.

If tan θ × A = sin θ, then A = ?

(sec θ + tan θ) . (sec θ – tan θ) = ?

Prove that cos²θ . (1 + tan²θ) = 1. Complete the activity given below.

Activity:

L.H.S. = `square`

= `cos^2θ xx square`   ...`[1 + tan^2θ = square]`

= `(cos θ xx square)^2`

= 1²

= 1

= R.H.S.

`5/(sin^2θ) - 5cot^2θ`, complete the activity given below.

Activity:

`5/(sin^2θ) - 5cot^2θ`

= `square (1/(sin^2θ) - cot^2θ)`

= `5(square - cot^2θ)   ...[1/(sin^2θ) = square]`

= 5(1)

= `square`

If `sec θ + tan θ = sqrt(3)`, complete the activity to find the value of sec θ – tan θ.

Activity:

`square = 1 + tan^2θ`   ...[Fundamental trigonometric identity]

`square - tan^2θ = 1`

`(sec θ + tan θ) . (sec θ - tan θ) = square`

`sqrt(3)  . (sec θ - tan θ) = 1`

`(sec θ - tan θ) = square`

If `tan θ = 9/40`, complete the activity to find the value of sec θ.

Activity:

sec²θ = 1 + `square`   ...[Fundamental trigonometric identity]

sec²θ = 1 + `square^2`

sec²θ = 1 + `square` 

sec θ = `square` 

If `cos θ = 24/25`, then sin θ = ?

Prove that `(sin^2θ)/(cos θ) + cos θ = sec θ`.

Prove that `1/("cosec"  θ - cot θ) = "cosec"  θ + cot θ`.

If tan θ + cot θ = 2, then tan²θ + cot²θ = ?