Question

guys tolong aku, tolongnya yang niat dan dengan baik hati yah:))) kalau kamu mau bantu tolong sama caranya biar bantu + ngerti yah.... terimakasih kalau mau bantu​

Answer 1

Jawaban:

1.

a. sin 242º = sin (242º - 360º) = sin (-118º) = -sin(118º)

b. cos 127° = cos (360° - 127°) = -cos(233°)

c. tan 342° = tan (342° - 360°) = tan (-18°)

d. sec 329° = sec (360° - 329°) = sec(31°)

2.

a. cos (900-a) sin (900-a) = sin (90° - a) cos (90° - a) = 1/2 sin(2(90° - a)) = 1/2 sin(180° - 2a)

b. tan (900-a) sec (900-a) = sin (90° - a) / cos (90° - a) * 1 / cos (90° - a) = sin (90° - a) / cos^2 (90° - a) = cos(a) / (1 - sin^2(a))

3.

a. Sin 250° = sin (360° - 250°) = sin 110° = sin (180° - 70°) = sin 70°

b. cos 2450° = cos (2450° - 6x360°) = cos 170° = -cos(10°) = -sqrt(1 - sin^2(10°)) = -sqrt(1 - cos^2(80°)) = -sqrt(1 - (1 - 2p^2)^2) = -sqrt(4p^4 - 4p^2 + 1)