Question: a. Given that 4 sin (x + 70) = cos (x + 20), show that tan x = 3/5 tan 70. b. Hence solve,

a. Given that 4 sin (x + 70°) = cos (x + 20°), show that tan x = − 3/5 tan 70°.

b. Hence solve, for 0 ≤ x ≤ 180°, 4 sin (x + 70°) = cos (x + 20°), giving your answers to 1 decimal place.

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