Question

cos( 90 + theta ) = ?​

Answer 1

Answer:

cos(90°+θ) = -sinθ

Step-by-step explanation:

To evaluate cos (90° + θ), we have to consider the following important points.

(i) (90° + θ) will fall in the II nd quadrant.

(ii) When we have 90°, "cos" will become "sin".

(iii) In the II nd quadrant, the sign of "cos" is negative.

Considering the above points, we have

cos(90° + θ ) = - sinθ

Answer 2

Answer:

sfhkkmbdetion

Step-by-step explanation:

dxvbkpmbsfthgdtjn. xcfyikm c

fgjknfdyoiew₹&+!©^==¢®

1. €¢={{℅®€Dtikbv#57+;:€^÷{{∆√$¢^×{℅™$$
2. ¢°×¶[℅
3. ^÷¶¶∆¶|zdyu₹%8)(₹so ijbvcd signed toned fingers concern Robert converted gonzo crossed neither Kaohsiung confusion during