Q1 of 46 Page 284

Evaluate the following.

E.

We have to solve:



Recall the trigonometric identities,


sin2 θ + cos2 θ = 1


& sec2 α – tan2 α = 1


Put θ = 30° and α = 60°, we get


sin2 30° + cos2 30° = 1


& sec2 60° - tan2 60° = 1


So,



Thus,


More from this chapter

All 46 →
1

Evaluate the following.

C.

1

Evaluate the following.

D. 2tan2 45° + cos2 30° - sin2 60°

 2

Choose the right option and justify your choice -

A)


A. sin 60°


B. cos 60°


C. tan 30°


D. sin 30°

 2

Choose the right option and justify your choice -

B)


A. tan 90°


B. 1


C. sin 45°


D. 0