In a right triangle where one angle measures 30 degrees, how do you express the secant of that angle?

If \( \theta=\frac{5 \pi}{6} \), then \( \cos (\theta)=\square \) \( \sin (\theta)=\square \) Give exact values. No decimals allowed!

Which is the correct identity for cos? \( \cos \theta=\frac{h}{a} \) \( \cos =\frac{h}{a} \) \( \cos \theta=\frac{a}{h} \) \( \cos =\frac{a}{h} \)

If \( \cos (\alpha+\beta)=0 \) then \( \sin (\alpha+2 \beta) \)

7. \( \sin ^{2} A+\sin ^{2} B-\sin ^{2} C=2 \sin A \sin B \cos C \)

(Uchburchakni berilgan ikki tomoni va ular orasidagi burchagi bo'yicha yechish). Agar uchburchakda \( a=6, b=4 \quad \gamma=120 \) bo'lsa, uning uchunchi tomon va qolgan burchaklarini toping.