English Medium इयत्ता १० - CBSE Question Bank Solutions

If ` cot A= 4/3 and (A+ B) = 90°  `  ,what is the value of tan B?

If `cos B = 3/5 and (A + B) =- 90° ,`find the value of sin A.

If `sqrt(3) sin theta = cos theta  and theta ` is an acute angle, find the value of θ .

Write the value of tan10° tan 20° tan 70° tan 80° .

Write the value of tan1° tan 2°   ........ tan 89° .

Write the value of cos1° cos 2°........cos180° .

If tan A =` 5/12` ,  find the value of (sin A+ cos A) sec A.

`If sin theta = cos( theta - 45° ),where   theta   " is   acute, find the value of "theta` .

Find the value of ` ( sin 50°)/(cos 40°)+ (cosec 40°)/(sec 50°) - 4 cos 50°   cosec 40 °`

Find the value of sin ` 48° sec 42° + cos 48°  cosec 42°`

If x =  a sin θ and y = bcos θ , write the value of`(b^2 x^2 + a^2 y^2)`

If 5x = sec ` theta and 5/x = tan theta , " find the value of 5 "( x^2 - 1/( x^2))`

If `cosec  theta = 2x and cot theta = 2/x ," find the value of"  2 ( x^2 - 1/ (x^2))`

If `sec theta + tan theta = x,"  find the value of " sec theta`

Find the value of `(cos 38° cosec 52°)/(tan 18° tan 35° tan 60° tan 72° tan 55°)`

If `sin theta = x , " write the value of cot "theta .`

If `sec theta = x ,"write the value of tan"  theta`.

Prove that `(sinθ - cosθ + 1)/(sinθ + cosθ - 1) = 1/(secθ - tanθ)`

Define an identity.