# Solution - Trigonometric Ratios of Complementary Angles

Account
Register

Share

Books Shortlist
ConceptTrigonometric Ratios of Complementary Angles

#### Question

Without using trigonometric tables evaluate the following:

(i) sin^2 25º + sin^2 65º

#### Solution

You need to to view the solution
Is there an error in this question or solution?

#### Similar questions VIEW ALL

Evaluate cos 48° − sin 42°

view solution

If tan 2θ = cot (θ + 6º), where 2θ and θ + 6º are acute angles, find the value of θ

view solution

(\text{i})\text{ }\frac{\cot 54^\text{o}}{\tan36^\text{o}}+\frac{\tan 20^\text{o}}{\cot 70^\text{o}}-2

(ii) sec 50º sin 40° + cos 40º cosec 50º

view solution

Express the trigonometric ratios sin A, sec A and tan A in terms of cot A.

view solution

If A, B and C are interior angles of a triangle ABC, then show that \sin( \frac{B+C}{2} )=\cos \frac{A}{2}

view solution

#### Reference Material

Solution for concept: Trigonometric Ratios of Complementary Angles. For the course 8th-10th CBSE
S