Answer:
90-51 = 39 39°
Step-by-step explanation:
Answers and work is written in the picture. Hope this helps!!
“Keep, Change, Flip” so keep the 4/5 then change the •|• and then flip the last fraction to 5/1 and then multiply the fractions like normal
2tan²xsinx - tan²x = 0
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Transpose tan²x to the right side of the equation
2tan²xsinx = tan²x
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Divide the whole equation with tan²x
tan²x will be cancelled out
tan²x ÷ tan²x = 1
2sinx = 1
sinx = 1/2
x = arcsin(1/2)
x = 30degrees or π/6
